All aboard for the final leg of Amtrak's Coast Starlight Northbound! This segment on the northbound journey takes viewers through the Cascade Mountains, as the train rolls through countless tunnels and snow sheds. A few hints along the way include possible side trips to the Columbia River Gorge and Mount St. Helens. Darkness falls as the train crosses into Washington State. This is part 3 of the Cost Starlight Northbound.